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1.
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Measurement of the nonlinear diffusion of the proton beam halo at the CERN LHC
/ Montanari, C.E. (Manchester U. ; CERN ; Cockcroft Inst. Accel. Sci. Tech.) ; Appleby, R.B. (Manchester U.) ; Bazzani, A. (Bologna U. ; INFN, Bologna) ; Giovannozzi, M. (CERN) ; Hermes, P. (CERN) ; Poyet, A. (CERN) ; Redaelli, S. (CERN) ; Sterbini, G. (CERN)
In circular particle accelerators, storage rings, or colliders, mitigating beam losses is critical to ensuring optimal performance, particularly for rings that include superconducting magnets. A thorough understanding of beam-halo dynamics is essential for this purpose. [...]
arXiv:2410.10708.-
2025-01-29 - 21 p.
- Published in : Eur. Phys. J. Plus 140 (2025) 86
Fulltext: Publication - PDF; 2410.10708 - PDF;
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LHC Upgrades in preparation of Run 3
/ Arduini, G (CERN) ; Baglin, V (CERN) ; Bartosik, H (CERN) ; Bottura, L (CERN) ; Bracco, C (CERN) ; Bradu, B (CERN) ; Bregliozzi, G (CERN) ; Brodzinski, K (CERN) ; Bruce, R (CERN) ; Calviani, M (CERN) et al.
The Large Hadron Collider (LHC) Long Shutdown 2(2019–2021), following LHC Run 2, was primarily dedicated to theupgrade of the LHC Injectors but it included also a significantamount of activities aimed at consolidation of the LHC machinecomponents, removal of known limitations and initial upgrades inview of the High-Luminosity LHC (HL-LHC) to favour the intensityramp-up during Run 3 (2022–2025). An overview of the majormodifications to the accelerator and its systems is followed by asummary of the results of the superconducting magnet trainingcampaign to increase the LHC operation energy beyond the maximumvalue of 6.5 TeV reached during Run 2. [...]
2024 - 138 p.
- Published in : JINST 19 (2024) P05061
Fulltext: PDF;
In : The Large Hadron Collider and The Experiments for Run 3, pp.P05061
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3.
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Potential and constraints of a beam-beam wire compensator in the HL-LHC era
/ Sterbini, G (CERN) ; Bertarelli, A (CERN) ; Papaphilippou, Y (CERN) ; Poyet, A (CERN) ; Rossi, A (CERN) ; Bélanger, P (TRIUMF)
The compensation of the long-range beam-beam interactions by DC wires is currently being investigated as an option for enhancing machine performance in the framework of the High-Luminosity LHC Project. In this paper, we report and comment on the potential of wire compensation during the first HL-LHC run. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) WEPL103
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.WEPL103
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4.
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5.
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Emittance Reduction with the Variable Dipole for the ELETTRA 2.0 Ring
/ Poyet, Axel (CERN) ; Domínguez, Manuel (Madrid, CIEMAT) ; Geometrante, Raffaella (Sincrotrone Trieste) ; Karantzoulis, Emanuel (Sincrotrone Trieste) ; Papaphilippou, Yannis (CERN) ; Toral, Fernando (Madrid, CIEMAT)
ELETTRA is a 2/2.4 GeV third-generation electron storage ring, located near Trieste, Italy. In view of a substantial increase of the machine performance in terms of brilliance, the so-called ELETTRA 2.0 upgrade is currently on-going. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 2586-2589
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.2586-2589
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7.
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First Experimental Evidence of a Beam-Beam Long-Range Compensation Using Wires in the Large Hadron Collider
/ Poyet, A. (CERN ; U. Grenoble Alpes) ; Bertarelli, A. (CERN) ; Carra, F. (CERN) ; Fartoukh, S.D. (CERN) ; Fuster-Martínez, N. (CERN) ; Karastathis, N. (CERN) ; Papaphilippou, Y. (CERN) ; Pojer, M. (CERN) ; Redaelli, S. (CERN) ; Rossi, A. (CERN) et al.
In high intensity and high energy colliders such as the CERN Large Hadron Collider and its future High Luminosity upgrade, interactions between the two beams around the different Interaction Points impose machine performance limitations. In fact, their effect reduces the beam lifetime and therefore the collider's luminosity reach. [...]
arXiv:2203.08066.-
2024-07-01 - 17 p.
- Published in : Phys. Rev. Accel. Beams 27 (2024) 071003
Fulltext: 2203.08066 - PDF; Publication - PDF;
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8.
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Exploiting the Beam-Beam Wire Demonstrators in the Next LHC Run 3
/ Poyet, Axel (U. Grenoble Alpes ; CERN) ; Fartoukh, Stephane (CERN) ; Karastathis, Nikolaos (CERN) ; Papaphilippou, Yannis (CERN) ; Rossi, Adriana (CERN) ; Skoufaris, Kyriacos (Crete U.) ; Sterbini, Guido (CERN)
After the successful experiments performed during the LHC Run 2 with the Beam-Beam Wire demonstrators installed, on Beam 2, in the frame of the HL-LHC project, two of the four wire demonstrators were moved to Beam 1. The objective is to gain operational experience with the wire compensation also on that beam and therefore fully exploit the demonstrators’ potential. [...]
2021 - 4 p.
- Published in : 10.18429/JACoW-IPAC2021-MOPAB008
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.65-68
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9.
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Numerical optimization of dc wire parameters for mitigation of the long range beam-beam interactions in High Luminosity Large Hadron Collider
/ Skoufaris, K (CERN ; Crete U. ; Unlisted, GR) ; Fartoukh, S (CERN) ; Papaphilippou, Y (CERN) ; Poyet, A (CERN) ; Rossi, A (CERN) ; Sterbini, G (CERN) ; Kaltchev, D (TRIUMF)
Several configurations of the High Luminosity Large Hadron Collider, whose performance at collision is mainly limited due to the strong beam-beam long-range interactions, are studied in the presence of dc wire compensators. This analysis is based on analytical and numerical calculations where the main observables are the dynamic aperture (correlated to the beam lifetime) and the frequency map analysis. [...]
2021 - 16 p.
- Published in : Phys. Rev. Accel. Beams 24 (2021) 074001
Fulltext: PDF;
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